what seems to be soem common ways are to use peat moss in the filter, use with a R.O. water, and theres always water softning pillows you cna buy to put in your filters also. maby soemone els has other ideas too.
thanks for the info! ya i heard of using peat moss probly give that a try just got a 75 gallon and when i set it up i dont want the very very hard water to affect whatever i put in there